package com.chapter12.lianxi;

public class MathUtil {

    public int a(int a,int b){
        return a+b;
    }
    public int b(int a,int b){
        return a-b;
    }
    public int c(int a,int b){
        return a*b;
    }
    public int d(int a,int b){
        return a/b;
    }

}
